William d



(No Model.)-

W. D. HUGHES.

DOOR LOCK AND ATTACHMENT.

No 393,648. Patented N0v.27, 1888.

To alZ whom it may concern.-

.at the option of the manufacturer.

UNITED STATES PATENT OFFICE.

\VILLIAM D. HUGHES, OF \VASHINGTON, DISTRICT OF COLUMBIA.

DOOR-LOCK AND ATTACHMENT.

ESPECIPICATION forming part of Letters Patent No. 393,648, dated November 27, 18218.

Application tiled February if), 1886. Serial No. 1015202 (No model.)

Be it known that 1, WILLIAM D. HUGHES, acitizen of the United States, residing at Washington, in the District of Columbia, have invented new and useful Improvements in Door Locks and Knob Attachments, of which invention the following is a specification, reference being had therein to the accompanying drawlugs.

In the drawings, Figure l is a perspective view of my improved door-lock case. Fig. 2 isadetached perspective view of the door-knob and the externally threaded and flanged tube. Fig. 3 is a perspective view of the rosette with the knob and spindle in position.

The object of my invention is to furnish a door lock and knob attachments in which the fullest degree of simplicity, usefulness, and incxpensiveness are developed.

\(Vith a view to the security of mortise locks in doors, and in order to furnish permanent means for securing the rosettes and the knobs on the door, my improved lock or latch case A has extensions V V at its upper and lower edges, outside of the chamber in which the devices of the lock are located. As seen in the drawings, the extensions V V are tapered to acute faces, the better to adapt the lock to a thin door, the tapers causing the lock to be supported on'eaeh side by the half of the full thickness of the door. The extensions may, however, be more obtuse at their extremities The extensions, formed as they are of solid metal, give strength to the lock-case. In the extensions V V there are screw-holes B B. These screw-holes receive screws R It, which perform the triple service of holding the look in the door and of holding the rosettes and the knobs on the door in'the most permanent manner. There are no screw-holes in the face-plate of the look A. By screws R R the rosettes, the door, and the lock are clamped together. If the shell on each side of the lock were as thin as a veneer, the lock would, nevertheless, be amply supported by the thick wood which binds the tapers on each side, clamped by the rosettes and the powerful screws R B, which have each half-inch bearings in solid metal in the extensions of the lock-ease. The advantages presented are the more appreciable in View of the rapidly-increasing scarcity of lumher and its consequent advance in price. The screws R R pass each other in the extensions of the lock-case. Therefore the length of the screws forms no impediment, provided they do not come in contact with the rosette on the opposite side of the door. There are only six screws employed in securing the lock in the door and in holding the rosettes and the knobs 'on the door, each screw performing a threefold service. The screws are all of uniform size. This facilitates manufacture, there being fewer tools required. Besides, time is saved in putting on the lock and its trimmings.

The obstacle to securing rosettes over mortise-locks, caused by the thin wood on each side of the lock, had occupied the attention of inventors for years. To secure the rosettes to the lock had been favorably entertained theoretically, but in practice it proved a failure, the thin material of the lock-case not affording holding places for screws, the lock-plate not being as thick as the space of a single thread. An effort had also been made to secure the rosettes by constructing studs in the interior of the lock, but without appreciable success, the studs interfering with the con struction of the lock. By my invention, it will be seen, all the obstacles and complications presented have been surmounted without adding to the expense of manufacturing the lock, and the interior of the lock-case is free from studs, screws, &c. Add to this the improved method which I present for securing the lock in the door and the knobs to the lock-case by the instrumentality of the rosettes.

The door-knob Chas a shank, D, of uniform thickness. The object of the uniform diame ter of the knob-shank is to render it capable of receiving internal thread of large diameter without any portion of the knob-shank being excessively thick or any part of the threaded space being hurtfully thin. The internal thread in the knob shank D receives the threaded portion of an externally threaded and flanged tube, E. The flange upon the tube E engages the recess F in the inner face of the rosette G. the knob C upon the door. The thread in the knob-shank D is limited. Therefore the knobshank and the externally threaded and flanged tube E have each a corresponding spindle-receiving socket, H, adapted to receive an an- Thus the rosette is enabled to hold IOO gular knob spindle, I. The spindlereceiving Socket in the externally threaded and flanged tube E is the full length of the tube. The knobspindle I, while performing its ordinary function, locks the threaded parts in each other. The recess F in the rosette G causes the flange upon the tube E to be in line with the inner face of the rosette. Therefore the flange does not protrude. There are four short pins, J J, cast on the inner side of the rosette G-one near each corner. These pins are pressed into the door by the rosette screws. Therefore the rosette cannot shift. This increases the stability of the lock in the door, as the rosettes and the lock are secured by the same screws. A collar on the knob-shank resting against the rosette precludes the shank pressing against the door. The knob attachment is selfadjusting regardless of the thick ness of the door.

I do not confine my method of attaching knobs to locks of any special pattern. The method is applicable to all door-locks.

In putting the rosette G on the door, first put the tube E in place in the rosette; then apply the rosette to the door and secure it with screws, screw the knobshank upon the tube, and the knob is upon the door. Thus the knob is not in the way while putting the rosette on the door and securing the lock in the door.

\Vhat I claim as new, and desire to have se cured to me by Letters Patent, is-

1. A mortise lock or latch case having extensions outside of the chamber in which the devices of the lock are located, said extensions being provided with screw-holes,as described, and for the purpose set forth.

2. The combination,with a mortise lock-casc having extensions, said extensions being provided with screw holes adapted to receive screws which hold the lock in thedoor, of two rosettes and two knobs, the rosettes being adapted to be secured in place by the screws which hold thelock in the door, the knobs being adapted to be held in position on the door by the rosettes engaging flanges on the ends of the knob-shanks, as set forth.

3. The combination, with an externally threaded and flanged tube and a door-knob having an internally-threaded shank,ofaknobspindle and a rosette, the flange fitting in said rosette without protruding therefrom, whereby the device is adapted to the thinnest door, substantially as described.

In testimony that I claim the foregoing as my invention witness my hand.

\V. I). HUGHES.

\Vitnesses:

W. A. RUFF, F. H. SoHo'rT. 

